I was "levelheaded" before I was married and had kids. Now everything seems to be askew. I'm just looking to have the car sit level before I start installing the S&W 8 pt made for my Aspen. Considering that the concrete floor is not, an addition was made to the existing garage and there are some inclines were one floor meets the existing floor. Can I just let the car sit on the concrete and just adjust the L to R of the body and just let the front to back be the way it sits on the floor? Weld it in from there?